Recent discussions concerning the likelihood of encountering extraterrestrial technological civilizations have run into an apparent paradox. If, as many now contend, interstellar exploration and settlement is possible at non-relativistic speeds, then reasonable calculations suggest that space-faring species, or their machine surrogates, should pervade the Galaxy. The apparent absence of evidence for extraterrestrial civilizations, herein called 'the Great Silence' places severe burdens on present models.
Quarterly Journal of the Royal Astronomical Society
- Pub Date:
- September 1983